We mathematicans are all a bit crazy.

Everybody has a capacity for a happy life. All these talks about how difficult times we live in, that's just a clever way to justify fear and laziness.

Most important part of doing physics is the knowledge of approximation.

A method is more important than a discovery, since the right method will lead to new and even more important discoveries.

Product of optimism and knowledge is a constant.

Cosmologists are often in error, but never in doubt

Money is in the exponent. And exponent needs to be calculated precisely.

Why add prime numbers? Prime numbers are made to be multiplied, not added.

The most beautiful place I've ever been is in your heart.

Optimism is denial for chumps with no life experience"."What's pessimism?" I said."Religion without God.

Logic is what the devil likes most.

If so, I couldn't imagine how the opposite gender managed to get out of bed in the morning. They might be lovely to look at, but clear thinking wasn't their strong point.

I listen to a variety of stuff on my iPod: Chemical Brothers, Prodigy, Public Enemy, Foo Fighters, anything that gets my adrenalin flowing.

Congressional leaders on the Republican side are hoping chief of staff is [Reince] Priebus. They see Priebus as somebody who they can clearly work with.

I find it more enjoyable investing time doing what pleases me, rather than wasting precious time attempting to please everyone else.

When you live life for yourself it's hard on everyone. And that hasn't changed. For me, if anything, it's gotten worse.

I think we need to push harder, we the Democrats, because it's an open door for the Republicans - prosperity centers.

For we can only know that we know nothing, and a little knowledge is a dangerous thing.